but now we are going to here from a scholar james miller from boston university, we are going to here a scholar and then dr. shive could come in and help us out further, explain exactly what this means in that context. so if we could, james miller from boston university. >> well first of all yin yang isn't just a taoist idea. and it's something that is, that forms the basic cosmological outlook for the whole of the chinese religion. however, it is true to say that it is something; it is a symbol that has particular application in taoism. now the yin and yang respectively mean the shady side of the mountain and the sunny side the mountain. and if we imagine the mountain and you see the - and throughout the course of the day as the sun traverses over the mountain, part of the mountain at one time will be in shade and towards the later time in the day it will be - that part of the mountain will be in the sunlight. and so from this just sort of very, very basic observation we can discern what is for the chinese conciseness the fundamental process that underlies everything that happens in